Crystal structure and low-energy Einstein mode in ErV2Al20 intermetallic cage compound
Single crystals of a new ternary aluminide ErV2Al20 were grown using a self-flux method. The crystal structure was determined by powder X-ray diffraction measurements and Rietveld refinement, and physical properties were studied by means of electrical resistivity, magnetic susceptibility and specific heat measurements. These measurements reveal that ErV2Al20 is a Curie-Weiss paramagnet down to 1.95 K with an effective magnetic moment μeff =9.27(1) μB and Curie-Weiss temperature ΘCW =−0.55(4) K. The heat capacity measurements show a broad anomaly at low temperatures that is attributed to the presence of a low-energy Einstein mode with characteristic temperature ΘE =44 K, approximately twice as high as in the isostructural ‘Einstein solid’ VAl10.1.
Michał Jerzy Winiarski, Tomasz Klimczuk. (2017). Crystal structure and low-energy Einstein mode in ErV2Al20 intermetallic cage compound. Journal Of Solid State Chemistry, 245, 10-16. https://doi.org/10.1016/j.jssc.2016.09.029
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